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Restructuring Charges Schedule of Restructuring and Related Costs (Tables)
 12 Months Ended
Dec. 31, 2018
Restructuring and Related Activities [Abstract]  
Restructuring and Related Costs [Table Text Block]
The following table summarizes the activity for the restructuring-related charges discussed above and related accrual (in thousands):
 
Accrued Balance January 1, 2017
 
Charges incurred
 
Payments
 
Other Adjustments
 
Accrued Balance December 31, 2017
 
Charges incurred
 
Payments
 
Other Adjustments
 
Accrued Balance December 31, 2018
Severance pay and benefits
$
53

 
$
15,983

 
$
(15,104
)
 
$
(17
)
 
$
915

 
$
4,311

 
$
(4,549
)
 
$
—

 
$
677

Employment agreement buyout
1,477

 
—

 
(363
)
 
—

 
1,114

 
—

 
(368
)
 
(7
)
 
739

Retention and facility closure expenses
—

 
2,789

 
(2,789
)
 
—

 
—

 
160

 
(160
)
 
—

 
—

 
$
1,530

 
$
18,772

 
$
(18,256
)
 
$
(17
)
 
$
2,029

 
$
4,471

 
$
(5,077
)
 
$
(7
)
 
$
1,416